Celestin blue B
Celestin blue B is used in solution with an iron alum mordant as a hematoxylin substitute in the H&E stain. When this staining is followed by a progressive alum hematoxylin, an acid resistant nuclear stain is obtained (celestin blue-hemalum sequence).
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.
Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.